Anyone have a copy of the TSB dated Mar 9, 2007 with number T-B-31.19/07d that describes how to install an electric trailer brake controller that they would be willing to share? I have seen reference to this TSB in various places, but not a copy of it. It is my understanding that there is a 4 wire pigtail under the dash that can be hooked right up to the controller, and that the TSB contains the wiring diagram.

None of the MB dealers in my area will install the controller, and only 1 hitch place anywhere near here would be willing to do it, so I am just going to do it myself.